21,1 Shaw: Merrillosphaera 101 
a contracted opening through which a daughter may have been 
born. Each .of the daughters contains eight gonidia except the 
upper one, which has nine. The diameter of the mother is about 
570 » (compressed to about 112 » thick), of the uppermost daugh- 
ter about 175 by 190 », and of the smallest about 130 by 1385 xz. 
The number of cells in the mother was estimated to be 3,300 
(probably less), in the uppermost daughter 1,700, and in the 
smallest daughter 1,500. The gonidia of the uppermost daughter 
measure 18 to 25 », and of the smallest 18 to 19 uz. 
Specimen 30.—An asexual coenobium, Plate 5, fig. 36, with 
twelve reproductive bodies, ten of them segmented and two un- 
segmented gonidia. The two gonidia are in the hinder part of 
the coenobium and measure 54 and 54 by 57». The others have 
divided into 2, 4, or 8 cells, and are in process of dividing again. 
The number of cells in the coenobium was estimated at 5,000, 
though it is probably considerably less. 
Specimen 31.—An asexual coenobium with eight gonidia very 
symmetrically arranged is shown in Plate 2, fig.14. It measures 
about 350 by 380 » and has about 2,800 somatic cells. The goni- 
dia measure about 50 to 55 pz. 
Specimen 32.—A slightly younger asexual coenobium shown in 
Plate 2, fig. 9, has nine gonidia that measure about 53 p, 55 p, 
and 46 ». The number of somatic cells was estimated to be 
2,750. 
- . Specimen 33.—A still younger coenobium with ten gonidia 
that do not conform to the typical arrangement is shown in Plate 
3, fig. 16. In this the smaller gonidia are two, nearest the for- 
ward pole, that measure 37 and 39 », the others measuring 43 
and 43 to 46 ». The number of cells in the coenobium was 
estimated to be 1,800. 
Specimen 34.—The youngest free coenobium shown of this 
lot is the one given in Plate 2, fig. 10. It contains twelve gonidia 
symmetrically arranged but with the middle quartet rather for- 
ward and separated from the hinder quartet. The number of 
somatic cells was estimated to be about 2,800. The gonidia 
measured 32 » in the first and second groups and 28 » in the third 
group. 7 
On the same slide with the specimens numbered from 29 to 
34 are twenty-two others of the same form. Some of these, 
like specimen 30, have the gonidia segmented. Two of these 
are noteworthy. They are: 
Specimen 35.—This is an asexual coenobium similar to speci- 
men 81. It has eight reproductive bodies very symmetrically 
